3. Proportion is the ratio of the previous paragraph to 1. ( )

4. 1 kg metal ratio 1 kg cotton weight. ( )

5.1100 and 1% are fractions with denominator of100, which have the same meaning. ( )

6. The volume of a cone is two thirds smaller than that of a cylinder. ( )

7. Two rays can form an angle. ( )

8. After a rectangular wooden frame is drawn into a parallelogram, the sum of the internal angles of the four corners remains unchanged. ( )

9. In any cuboid, only two opposite faces are completely equal. ( )

10, two rectangles with equal perimeters must also have equal areas. ( )

1 1, an object with a volume of 1 cubic decimeter must have a bottom area of 1 cubic decimeter. ( )

12. The bottom area of a cube with a volume of 1 cubic decimeter must be 1 square decimeter. ( )

13, the working efficiency is inversely proportional to the working time. ( )

Original term 14 increased 10%. To keep the proportion unchanged, the latter term should be multiplied by 1. 1. ( )

15 and 5 kg of salt are dissolved in 100 kg of water, and the salt content of brine is 5%. ( )

16, with large scale and large actual distance. ( )

17. If the perimeter of a square is equal to the perimeter of a circle, the area ratio of the square to the circle is ∏ 7: 4. ( )

18, the smaller the decimal value, the smaller the decimal unit. ( )

19, 7m 1/8 is as long as 8m 1/7. ( )

20. Two disjoint straight lines are called parallel lines. ( )

2 1, Xiao Wang processed 99 parts, 99 of which were qualified, and the qualified rate of these parts was 99%. ( )

22. Five workers process five parts in five hours, so 1 worker processes 1 part in 0 hours. ( )

23. Adding two zeros to the end of a number will enlarge the original number by 100 times. ( )

24. There are 365 days in a year. ( )

25. The area at the bottom of the cylinder is expanded by 3 times and the volume is expanded by 3 times. ( )

26. 12/ 15 cannot be converted into a finite decimal. ( )

27. Numbers divisible by 3 must be divisible by 9. ( )

28.a, B and C are three natural numbers (and not equal to 0), in a = b× c.

A and b must be divisors of a ()

B and c must be the greatest common divisor of a and B. ()

C and a must be the least common multiple of a and B. ()

D and a must be common multiples of b and c. ()

29. The sum of two acute angles must be obtuse. ( )

30. In proportion, if two internal terms are reciprocal, then two external terms are reciprocal. ( )

3 1, the words "net content: 250 ml" are on the "Guangming" milk packaging box, and this 250 ml refers to the volume of the packaging box. ( )

32, x+y=ky(k must), then x and y are out of proportion. ( )

33. The same road takes 5 hours for Party A and 4 hours for Party B.. The speed ratio between Party A and Party B is 5:4. ( )

34. An angle greater than 90 is an obtuse angle. ( )

35. As long as this number is divisible by 2, it is even. ( )

2. Because 1.5÷0.5=3, 1.5 can be divisible by 0.5. ()

When a number is multiplied by a decimal, the product must be less than this number. ()

When an integer is divided by a decimal, the quotient must be greater than this integer. ()

Multiplying a number by 0.05 means finding 5% of this number. ()

6. The area of parallelogram is larger than that of triangle. ()

7. Two trapezoids with the same shape have the same area. ()

8.3× b+5 can be written as 3+5b. ()

The fifth grade math judgment question (good! Urgently needed)

Reward score: 10 | solving time: 2010-2-217:19 | questioner: water mirror j Rui X Er.

The best answer 1.a3 must be greater than 3a. ( )

2. "0" means there is no object, so 0 is not a number. ( )

Divide 3.0 by any number to get 0. ( )

4. Natural numbers can represent both "how much" and "what number". ( )

5. "There are three passengers living in Room Three." The two 3s in this sentence have different meanings. ( )

6. If 1÷a=b, then A and B are reciprocal. ( )

7. There is only one decimal greater than 1.4 and less than 1.6. ( )

9. If a score is less than its reciprocal, it must be a real score. ( )

10. When a number is multiplied by a true fraction, the products obtained are all less than the multiplicand. ( )

12. False score is definitely not the simplest score. ( )

13. The score is less than an integer. ( )

16. The numerator and denominator of the fraction are multiplied or divided by the same natural number at the same time, and the size of the fraction remains unchanged. ( )

17.85000 ml =85 liters =85 cubic decimeters. ( )

The product of 18.4 is 0. 25 is 1. ( )

19. The second half of February in a normal year is 9 days. ( )

20. 1996 is a leap year, when the sixth Olympic Games was held in the United States. Therefore, the Olympic Games will be held in leap years every four years. ( )

2 1. The minute of the clock turns once, and the hour hand turns 30. ( )

None of the four zeros of 23.5500 is read. ( )

24. The greater the denominator of a score, the greater the unit of the score. ( )

25. The maximum decimal counting unit is 80% smaller than the maximum number unit. ( )

26. unit of volume is larger than an area unit. ( )

27.A and B are both natural numbers. If a number ÷0.52= B number, then a number must be less than b number. ( )

28.5.3727327 is a cyclic decimal. ( )

( )

30.7.8+7.8+2.2+2.2=(7.8+2.2)×2。 ( )

5 times of 3 1.x is 0.7 and less than 3.2, so the equation for finding X. column is 5x-3.2=0.7. ( )

32. The value of the unknown quantity that makes both sides of the equation equal is called solving the equation. ( )

33. 15 ÷ 10 =1.5. It can be said that 15 is 0.5 times of 10, so15 is a multiple of10. ( )

34.4.9 Divided by 1.6 quotient 3, the remainder is 1. ( )

37.70% translated into 70%. ( )

38. 30% of1meter is 30% meter. ( )

39.0.8 and 0.800 have the same size and the same counting unit. ( )

40. Add 0 to the end of the decimal, and the size of the decimal remains the same. ( )

Add a "%"after 4 1.20, and subtract 100 times from the figure. ( )

( )

45. If the number A increases by 100%, which is exactly equal to the number B, then the original number A is twice that of the number B. ()

( )

( )

49. If the number of girls is less than 4% of the class, then the number of boys is more than 4% of the class. ( )

50. Flour is 45 tons less than rice. If rice and flour are sold at 40% each, rice is 45 tons more than flour. ( )

Absolute equality. ( )

52. From A to B, A takes 10 hour, B takes 8 hours, and B is 25% faster ... ()

53. Grade 6 102 people took the graduation examination and all passed, with a passing rate of 102%. ( )

54. Students in Class Six (1) did a math problem, and 40 students were right and 4 students were wrong. The error rate of solving this problem is 10%. ( )

55. Donations were made to the disaster-stricken areas, with 54 people in six classes (1), and the donation rate was 100%. 54 people in this class donated money. ( )

56. Small military families participate in "ordinary family property insurance", with the insured amount of 30,000 yuan, calculated at the insurance rate of 0.2% per year. After three years of insurance, the premium is 180 yuan. ( )

57. The sum of all prime numbers within10 is still a prime number. ( )

58. All odd numbers are prime numbers and all even numbers are composite numbers. ( )

59. The product of two prime numbers must be a composite number. ( )

60. Natural numbers are either prime numbers or composite numbers. ( )

The composite number of 6 1. can be divisible by 2. ( )

62. A composite number has at least three divisors. ( )

63. The sum of three natural numbers must be less than their product. ( )

64. Because a÷b=7, A can be divisible by B. ()

65. The divisor and multiple of a number are sometimes equal. ( )

66. The least common multiple of two numbers must be the multiple of their greatest common divisor. ( )

67. In a÷b=c, if A is divisible by B, then A is a multiple of B and also a multiple of C .. ()

68.A number is a multiple of B number, and B number is the greatest common divisor of A number. ( )

The prime factor of 69.90 decomposition is 90=2×5×9. ( )

70. Two numbers whose divisor is 1 are called prime numbers. ( )

7 1. The prime number is only 1 divisor. ( )

72. A prime number and any natural number smaller than it are all prime numbers. ( )

73. The common divisor is only 1 two different numbers, which must be prime numbers. ( )

74. If the product of two numbers is their least common multiple, then these two numbers must be prime numbers. ( )

75. If A and B are different prime numbers, then A and B must be prime numbers. ( )

76. Two numbers are prime numbers, not necessarily prime numbers. ( )

77. A number that contains both divisor 2 and divisible by 3 must be a multiple of 6. ( )

78. The sum of the upper and lower bottoms of a trapezoid is certain, and its height is directly proportional to its area. ( )

79. The area of one side of a cube is directly proportional to its surface area. ( )

80. The former term of the ratio is fixed, and the latter term is inversely proportional to the ratio. ( )

82. Xiaoying 10 minutes, Xiaoming comes home from school in 8 minutes. The speed ratio between Xiaoying and Xiaoming is 4: 5. ( )

83. 1.4: 2 can be proportional to 7: 10. ( )

84. If 3a = 4b and neither a nor b is zero, then A: B = 3: 4. ( )

16∶9。 ( )

( )

87. In proportion, if the product of the two numbers that make up the inner term is 1, then the two numbers that make up the outer term are reciprocal. ( )

89. In order to clearly show the altitude of Wuyue Mountain, a histogram can be drawn. ( )

90. On the map, the 6 cm line segment represents the actual distance of 6 km. The scale of this map is 1: 100000. ( )

9 1. The longer the two sides of an angle, the larger the angle. ( )

92. The obtuse angle must be greater than the right angle. ( )

93. A trapezoid has an axis of symmetry. ( )

94. The picture on the right is a graph with four equal circles close together, and it has four axes of symmetry. ( )

95. If the length and width of a rectangle increase by 6 meters, the area will increase by 36 square meters. ( )

96. The three angles of an isosceles triangle must be 45,45 ().

97. Divide an equilateral triangle into three triangles, and the sum of the internal angles of these three triangles is 540 degrees. ( )

98. At least two angles in a triangle are acute. ( )

99. An isosceles triangle can be cut along the height of the bottom of the isosceles triangle and divided into two equal right triangles. ( )

100. Four sides of a parallelogram, each of which can be used as the base. ( )

10 1. If the heights of triangle and parallelogram are equal, the area of triangle is half that of parallelogram. ( )

102. If two groups of opposite sides of a parallelogram are equal to two groups of opposite sides of a rectangle, their areas are equal. ( )

103. Two trapezoids with the same area can be combined into a parallelogram. ( )

104. Two identical isosceles trapezoid can be combined into a parallelogram. ( )

105. All circles have equal pi. ( )

106. The line segment passing through the center of the circle is called the diameter. ( )

107. The area of a circle is directly proportional to its radius. ( )

108. When the side length of a cube is doubled, its volume is also doubled. ( )

109. The base area of a cuboid is 10 square decimeter, the height is 7 cm, and the volume is 7 cubic decimeter. ( )

1 10. Tie a cross packing rope on both sides of the rectangular commodity packing box, and the length of the packing rope used should be at least the sum of the sides of the carton. ( )

1 1 1. The radius of the cylinder bottom is r, the height is h, and its surface area is 2π(h+r) indicated by letters. ( )

1 12. The radius of the bottom surface of the cylinder is enlarged by 2 times, the height is also enlarged by 2 times, and the side area is enlarged by 4 times. ( )

1 13. A cylinder is 2 meters long. After being divided into two equal sections, the surface area is increased by 6.28 square decimeter, so the volume of each section is 3 1.4 cubic decimeter. ( )

1 15. The cylinder and the cone are equal in height, and the difference in volume is 6.28 cubic centimeters, so the sum of their volumes is 12.56 cubic centimeters. ( )

1 16. Any prime plus 1 is not necessarily an even number. ( )

1 17. The coprime of two numbers must be a prime number. ( )

1 18. All composite numbers can be expressed by multiplying prime numbers. ( )

1 19. The original quantity is reduced by 20%. Get a new number, the original number is 20% more than the new number. ( )

120. Any circle has countless axes of symmetry. ( )

12 1. Two disjoint straight lines are called parallel lines. ( )

122. The product of any natural number multiplied by 2 must be a composite number. ( )

123. The area of parallelogram is equal to twice the area of triangle. ( )

124. 1 divided by any natural number is equal to the reciprocal of this natural number. ( )

125. The numerator of a false fraction must be greater than its denominator. ( )

126. Because 3x=5y and x∶y=5∶3. ( )

127. Two sectors with equal central angles have equal areas. ( )

128. The side length of a square is equal to the radius of a circle, so the ratio of square area to circle area is 1: π. ( )

129. In proportion, if the product of two outer terms is 1, then the two inner terms must be reciprocal. ( )

130.6.444 is a cyclic decimal. ( )

13 1. The smallest prime number is the greatest common divisor of all even numbers in a natural number. ( )

132. An equilateral triangle must be an acute triangle. ( )

133.A×B= 1, then the numbers a and b are reversed ().

134. The least common multiple of any two different natural numbers is greater than either of these two numbers. ( )

135. It takes 2 hours for Party A to do it alone and 3 hours for Party B to do it alone. ()

136. The number of boys is 5% more than that of girls. Then girls are 5% less than boys. (

Respondent: Naive Persian Cat | Level 1 | 201-2-1116: 35.

Right or wrong

Natural numbers are larger than decimals. ( )

Of course, two trapezoids with equal areas can form a parallelogram. ( )

After writing a three-digit decimal into a one-digit decimal, the number will inevitably become smaller. ( )

The quotient of an odd number divided by a decimal number must be greater than this odd number. ( )

The base of the triangle is multiplied by 3, and the height is multiplied by 2, and the area is five times that of the original one. ( )

Approximation shows that 7.00 meters is equal to 7 meters long, but 7.00 meters is more accurate than 7 meters. ()

Decimals with two different counting units, the bigger the counting unit, the bigger the decimal. ( )

6.2? 4 means 6.2 times of 4. ( )